Trusted Computing Group (TCG) provides a TPM and OPAL spec. The more common term is SED (self encrypting drive) where FDE tends to be software (typically OS). FDE (full drive encryption) is probably better considered "volume encryption" since it applies to file system volumes. It's possible for other volumes and partitions on a drive to not be encrypted.

Many consumer drives are SEDs now. Check out the Samsung 840 EVO which is such a thing. It's always encrypting, it's just that out of the box it's always unlocked (i.e. it provides itself with the DEK at power on).